Error after login when "Stay logged in on this computer" is checked

[vicentini]

The following error is shown on a blank page after login, when "Stay logged in on this computer" is checked on the login page.

Warning: trim() expects parameter 1 to be string, array given in /var/www/html/inc/functions.php on line 156
Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/inc/functions.php:156) in /var/www/html/inc/functions.php on line 145
Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/inc/functions.php:156) in /var/www/html/login.php on line 27

Even though the error shows up, the login seems to work. After a refresh of the page the user is logged in and the contacts are presented as expected.

My installation is as follows

• contagged 0.8.0
• php 5.6.33
• Red Hat directory server (ldap)
• no anonymous bind
• public address book is only viewable by logged in users

[vicentini]

I've found the reason for this issue. As it's only a small fix I won't create a pull request for it.

In file ./inc/functions.php line 156
return md5(trim(file($file)));
the file method returns an array of strings which trim can't work on.

Instead the method file_get_contents should be used which returns a string with the whole file content.
return md5(trim(file_get_contents($file)));